CN107831614A - 像素驱动架构及显示装置 - Google Patents
像素驱动架构及显示装置 Download PDFInfo
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Abstract
本发明公开了一种像素驱动架构及显示装置,像素驱动架构包括像素单元;扫描线,输出扫描信号;数据线,输出数据信号;栅极驱动器,提供扫描信号;源极驱动器,提供数据信号;时序控制器,提供时序信号;在相邻数据线之间设置开关,通过时序控制器控制开关导通或断开。通过上述方式,本发明能够减小源极驱动器需要驱动的像素亮暗切换的压降,从而减小驱动电路的功耗,解决在重载画面下源极驱动器温度过高的问题。
Description
技术领域
本发明涉及显示技术领域,特别是涉及一种像素驱动架构及显示装置。
背景技术
液晶显示装置中,施加在液晶分子的驱动电压必须每隔一段时间进行反转,用以避免液晶材料产生极化而造成永久性的破坏,也用以避免图像残存效应。因此,提出了各种极性反转方法,包括有:帧反转、行反转、列反转和点反转。
如图1及图2所示,在列反转的方法中,出现像素单元亮暗(H/L)间隔的重载画面时,数据线需要做像素单元亮暗电压切换,驱动电路需要把奇数列数据线上的电压从V1降到V3,偶数列数据线上的电压从V2升到V3,压差较大,源极驱动器的输出功耗变大,发热变大;若是散热措施不好,温度会缓慢升高,从而影响产品质量可靠性。
发明内容
本发明主要解决的技术问题是提供一种像素驱动架构及显示装置,以减小驱动电路需要驱动的像素单元亮暗切换的压降,从而减小驱动电路的功耗,解决在重载画面下源极驱动器温度过高的问题。
为解决上述技术问题,本发明采用的一个技术方案是:
提供一种像素驱动架构,包括:
像素单元;
扫描线,用于输出扫描信号给所述像素单元;
若干奇数列数据线及若干偶数列数据线,用于输出数据信号给所述像素单元;
栅极驱动器,通过所述扫描线与所述像素单元连接,用于输出所述扫描信号;
源极驱动器,通过所述若干奇数列数据线及所述若干偶数列数据线与所述像素单元连接,用于输出所述数据信号,形成正负驱动极性;
时序控制器,连接栅极驱动器及源极驱动器,用于输出时序信号给所述栅极驱动器及所述源极驱动器;及
每一奇数列数据线与相邻偶数列数据线之间设置开关,所述开关包括控制端、第一端及第二端,所述开关的控制端连接所述时序控制器以通过所述时序控制器控制所述开关导通或断开,所述开关的第一端连接奇数列数据线,所述开关的第二端连接偶数列数据线。
为解决上述技术问题,本发明采用的另一个技术方案是:
提供一种液晶显示装置,包括像素驱动架构,所述像素驱动架构包括:
像素单元;
扫描线,用于输出扫描信号给所述像素单元;
若干奇数列数据线及若干偶数列数据线,用于输出数据信号给所述像素单元;
栅极驱动器,通过所述扫描线与所述像素单元连接,用于输出所述扫描信号;
源极驱动器,通过所述若干奇数列数据线及所述若干偶数列数据线与所述像素单元连接,用于输出所述数据信号,形成正负驱动极性;
时序控制器,连接栅极驱动器及源极驱动器,用于输出时序信号给所述栅极驱动器及所述源极驱动器;及
每一奇数列数据线与相邻偶数列数据线之间设置开关,所述开关包括控制端、第一端及第二端,所述开关的控制端连接所述时序控制器以通过所述时序控制器控制所述开关导通或断开,所述开关的第一端连接奇数列数据线,所述开关的第二端连接偶数列数据线。
本发明的有益效果是:区别于现有技术的情况,本发明通过在每一奇数列数据线与相邻偶数列数据线之间设置开关,通过时序控制器控制开关的导通或断开,以减小源极驱动器需要驱动的像素亮暗切换的压降,从而减小驱动电路的功耗,解决在重载画面下源极驱动器温度过高的问题。
附图说明
图1是现有的像素驱动架构的示意图;
图2是图1的像素亮暗切换电压变化示意图;
图3是本发明像素驱动架构的示意图;
图4是图3的像素亮暗切换电压变化示意图;
图5是本发明显示装置的结构示意图。
具体实施方式
下面结合附图和实施例对本发明进行详细的说明。
请参阅图3,是本发明像素驱动架构的示意图。所述像素驱动架构,包括:
像素单元10;
扫描线20,用于输出扫描信号给所述像素单元10;
若干奇数列数据线31及若干偶数列数据线32,用于输出数据信号给所述像素单元10;
栅极驱动器40,通过所述扫描线20与所述像素单元10连接,用于输出所述扫描信号;
源极驱动器50,通过所述若干奇数列数据线31及所述若干偶数列数据线32与所述像素单元10连接,用于输出所述数据信号,形成正负驱动极性;
时序控制器60,连接所述栅极驱动器40及所述源极驱动器50,用于输出时序信号给所述栅极驱动器40及所述源极驱动器50;及
每一奇数列数据线31与相邻偶数列数据线32之间设置开关70,所述开关包括第一端71、第二端72及控制端73,所述开关70的控制端73连接所述时序控制器60以通过所述时序控制器60控制所述开关70导通或断开,所述开关70的第一端71连接奇数列数据线31,所述开关的第二端72连接偶数列数据线32;
具体地,所述奇数列数据线31上连接的像素单元10与相邻所述偶数列数据线32上连接的像素单元10的驱动极性相反。
在列反转的方法中,奇数列数据线31和偶数列数据线32上的驱动极性相反。例如,在一帧中,奇数列数据线31驱动极性为正,偶数列数据线32驱动极性为负,下一帧,奇数列数据线31驱动极性切换为负,偶数列数据线32驱动极性切换为正电压,相邻数据线30驱动极性都互相互反。在本实施例中,所述开关70设置在所述奇数列数据线31与相邻所述偶数列数据线32的远离所述源极驱动器50的一端。在其他实施例中,所述开关70也可设置在其他位置,只要所述开关70连接在一奇数列数据线31与所述奇数列数据线31相邻的偶数列数据线32之间即可,其并不限定于本实施例中所述开关70的位置关系。
所述像素驱动架构的工作原理描述如下:在所述源极驱动器50给当前行扫描线20,如第一行扫描线S1,连接的像素单元10充电完成且下一行扫描线20,第二行扫描线S2,连接的像素单元10充电前,所述时序控制器60输出第一控制信号给所述开关70的控制端73,以控制所述开关70导通,即所述开关70的第一端71通过控制端73与第二端72连接,所述奇数列数据线31上的电压从第一电压V1变化为第四电压V4,所述偶数列数据线32上的电压从第二电压V2变化为第五电压V5,之后所述时序控制器60输出第二控制信号给所述开关70的控制端73,以控制所述开关70断开,即所述开关70的第一端71通过控制端73与第二端72断开,所述源极驱动器50给所述下一行扫描线20,第二行扫描线S2连接的像素单元10充电时,所述奇数列数据线31上的电压从第四电压V4变化为第三电压V3,所述偶数列数据线32上的电压从第五电压V5变化为第三电压V3,所述源极驱动器50给下两行扫描线,如第三行扫描线,连接的像素单元10充电前,所述时序控制器60输出第一控制信号给所述开关70的控制端73以控制所述开关70导通,所述奇数列数据线31上的电压从第三电压V3变化为第四电压V4,所述偶数列数据线32上的电压从第三电压V3变化为第五电压V5,之后所述时序控制器60输出第二控制信号给所述开关70的控制端73以控制所述开关70断开,所述源极驱动器50给所述下两行扫描线,第三行扫描线S3连接的像素单元10充电时,所述奇数列数据线31上的电压从第四电压V4变换为第一电压V1,所述偶数列数据线32上的电压从第五电压V5变化为第三电压V3。
具体地,所述第一电压V1和所述第三电压V3差值的绝对值与所述第二电压V2与所述第三电压V3差值的绝对值相同,所述第四电压V4和所述第三电压V3差值的绝对值与所述第五电压V5和所述第三电压V3差值的绝对值相同,所述第一电压V1大于所述第四电压V4,所述第四电压V4大于所述第三电压V3。
请参阅图2,是现有像素驱动架构下像素亮暗切换电压变化示意图。其中,
V1:第一电压,奇数列数据线的充电电压,充电完成像素单元为亮态,电压为V1;
V2:第二电压,偶数列数据线的充电电压,充电完成像素单元为亮态,电压为V2;
V3:第三电压,像素单元暗态下电压;
从图2中可以看出,从曲线a到c:像素单元由亮态变为暗态,
源极驱动器驱动奇数列数据线连接的像素单元的电压由V1变为V3,
源极驱动器驱动偶数列数据线连接的像素单元的电压由V2变为V3;
从曲线c到d:像素单元充电完成,电压保持在第三电压V3并持续一段时间;
从曲线d到f:像素单元由暗态变为亮态,
源极驱动器驱动奇数列数据线连接的像素单元的电压由V3变为V1,
源极驱动器驱动偶数列数据线连接的像素单元的电压由V3变为V2。
因此从图2中可以看出,现有的像素驱动架构在出现像素单元亮暗间隔的重载画面时,数据线需要做像素单元亮暗电压切换,驱动电路直接把奇数列数据线上的电压从V1降到V3,偶数列数据线上的电压从V2升到V3,压差较大,源极驱动器的输出功耗变大,发热变大,若是散热措施不好,温度会缓慢升高,从而影响产品质量可靠性。
请参阅图4,是本发明像素驱动架构下像素亮暗切换电压变化示意图。
其中,
从图4中可以看出,从曲线a到b:像素单元10由亮态变为过渡态,
通过时序控制器60控制数据线30间设置的开关70导通,即所述开关70的第一端71通过控制端73与第二端72连接,所述第一电压V1和所述第二电压V2中和,
开关70导通瞬间,奇数列数据线31由所述第一电压V1变为过渡态第四电压V4,给相应连接的像素单元10充电至所述第四电压V4;偶数列数据线32由所述第二电压V2变为过渡态第五电压V5,给相应连接的像素单元10充电至所述第五电压V5;
再通过时序控制器60控制断开数据线30间设置的开关70,即所述开关70的第一端71通过控制端73与第二端72断开,
从曲线b到c:像素单元10由过渡态变为暗态,
源极驱动器50驱动奇数列数据线31连接的像素单元10的电压由所述第四电压V4变为所述第三电压V3,
源极驱动器50驱动偶数列数据线32连接的像素单元10的电压由所述第五电压V5变为所述第三电压V3;
从曲线d到e:像素单元10由暗态变为过渡态,
通过时序控制器60控制数据线30间设置的开关70导通,所述第一电压V1和所述第二电压V2中和,
奇数列数据线31由所述第三电压V3变为所述第四电压V4,给相应连接的像素单元10充电至所述第四电压V4,偶数列数据线32由所述第三电压V3变为所述第五电压V5,给对应连接的像素单元10充电至所述第五电压V5;
再通过所述时序控制器60控制断开数据线30间设置的开关70,
从曲线e到f:像素单元10由过渡态变为亮态,
源极驱动器50驱动奇数列数据线31连接的像素单元10的电压由所述第四电压V4变为所述第一电压V1,
源极驱动器50驱动偶数列数据线32连接的像素单元10的电压由所述第五电压V5变为所述第二电压V2。
因此从图4中可以看出,本发明的像素驱动架构在出现像素单元10亮暗间隔的重载画面时,数据线30需要做像素单元10亮暗电压切换,驱动电路把奇数列数据线31上的电压从V1降到V4,然后再从V4降到V3,偶数列数据线32上的电压从V2升到V5,然后再从V5升到V3,这样通过中间值使得压差变化小,以减小驱动电路需要驱动的像素单元10亮暗切换的压降,从而减小驱动电路的功耗,解决在重载画面下源极驱动器50温度过高的问题,进而提升了产品质量可靠性。
请参阅图5,是本发明,显示装置的结构示意图。所述显示装置2包括所述像素驱动架构1,所述显示装置可以为LCD或OLED,所述显示装置的其他器件及功能与现有显示装置的器件及功能相同,在此不再赘述。
本发明通过在相邻数据线之间设置开关,通过时序控制器控制开关导通或断开,由电压中和得到过渡态电压,使得像素单元亮暗切换时产生中间过渡态,再由源极驱动器驱动数据线电压变化,实现像素单元由过渡态到亮/暗态。通过上述方式本发明能够减小源极驱动器需要驱动的像素亮暗切换的压降,从而减小驱动电路的功耗,解决在重载画面下源极驱动器温度过高的问题。
以上所述仅为本发明的实施方式,并非因此限制本发明的专利范围,凡是利用本发明说明书及附图内容所作的等效结构或等效流程变换,或直接或间接运用在其他相关的技术领域,均同理包括在本发明的专利保护范围内。
Claims (10)
1.一种像素驱动架构,其特征在于,包括:
像素单元;
扫描线,用于输出扫描信号给所述像素单元;
若干奇数列数据线及若干偶数列数据线,用于输出数据信号给所述像素单元;
栅极驱动器,通过所述扫描线与所述像素单元连接,用于提供所述扫描信号;
源极驱动器,通过所述若干奇数列数据线及所述若干偶数列数据线与所述像素单元连接,用于提供所述数据信号,形成不同驱动极性;
时序控制器,连接所述栅极驱动器及所述源极驱动器,用于提供时序信号给所述栅极驱动器及所述源极驱动器;及
每一奇数列数据线与相邻偶数列数据线之间设置开关,所述开关包括控制端、第一端及第二端,所述开关的控制端连接所述时序控制器以通过所述时序控制器控制所述开关导通或断开,所述开关的第一端连接奇数列数据线,所述开关的第二端连接偶数列数据线。
2.根据权利要求1所述像素驱动架构,其特征在于,所述奇数列数据线上连接的像素单元与相邻所述偶数列数据线上连接的像素单元的驱动极性相反。
3.根据权利要求1所述像素驱动架构,其特征在于,所述开关设置在所述奇数列数据线与相邻所述偶数列数据线的远离所述源极驱动器的一端。
4.根据权利要求1所述像素驱动架构,其特征在于,
在所述源极驱动器给当前行扫描线连接的像素单元充电完成且下一行扫描线连接的像素单元充电前,所述时序控制器控制所述连接开关导通,所述奇数列数据线上的电压从第一电压变化为第四电压,所述偶数列数据线上的电压从第二电压变化为第五电压,之后所述时序控制器控制所述连接开关断开,所述源极驱动器给所述下一行扫描线连接的像素单元充电时,所述奇数列数据线上的电压从第四电压变化为第三电压,所述偶数列数据线上的电压从第五电压变化为第三电压,所述源极驱动器给下两行扫描线连接的像素单元充电前,所述时序控制器控制所述开关导通,所述奇数列数据线上的电压从第三电压变化为第四电压,所述偶数列数据线上的电压从第三电压变化为第五电压,之后所述时序控制器控制所述开关断开,所述源极驱动器给所述下两行扫描线连接的像素单元充电时,所述奇数列数据线上的电压从第四电压变换为第一电压,所述偶数列数据线上的电压从第五电压变化为第三电压。
5.根据权利要求4所述像素驱动架构,其特征在于,所述奇数列数据线上的电压变化相同,所述偶数列数据线上的电压变化相同,所述第一电压和所述第三电压差值的绝对值与所述第二电压与所述第三电压差值的绝对值相同,所述第四电压和所述第三电压差值的绝对值与所述第五电压和所述第三电压差值的绝对值相同,所述第一电压大于所述第四电压,所述第四电压大于所述第三电压。
6.一种显示装置,其特征在于,所述显示装置包括像素驱动架构:
像素单元;
扫描线,用于输出扫描信号给所述像素单元;
若干奇数列数据线及若干偶数列数据线,用于输出数据信号给所述像素单元;
栅极驱动器,通过所述扫描线与所述像素单元连接,用于输出所述扫描信号;
源极驱动器,通过所述若干奇数列数据线及所述若干偶数列数据线与所述像素单元连接,用于输出所述数据信号,形成不同驱动极性;
时序控制器,连接所述栅极驱动器及所述源极驱动器,用于输出时序信号给所述栅极驱动器及所述源极驱动器;及
每一奇数列数据线与相邻偶数列数据线之间设置开关,所述开关包括控制端、第一端及第二端,所述开关的控制端连接所述时序控制器以通过所述时序控制器控制所述开关导通或断开,所述开关的第一端连接奇数列数据线,所述开关的第二端连接偶数列数据线。
7.根据权利要6所述显示装置,其特征在于,所述奇数列数据线上连接的像素单元与相邻所述偶数列数据线上连接的像素单元驱动极性相反。
8.根据权利要求6所述显示装置,其特征在于,所述开关设置在所述奇数列数据线与相邻所述偶数列数据线的远离所述源极驱动器的一端。
9.根据权利要求6所述显示装置,其特征在于,
在所述源极驱动器给当前行扫描线连接的像素单元充电完成且下一行扫描线连接的像素单元充电前,所述时序控制器控制所述连接开关导通,所述奇数列数据线上的电压从第一电压变化为第四电压,所述偶数列数据线上的电压从第二电压变化为第五电压,之后所述时序控制器控制所述连接开关断开,所述源极驱动器给所述下一行扫描线连接的像素单元充电时,所述奇数列数据线上的电压从第四电压变化为第三电压,所述偶数列数据线上的电压从第五电压变化为第三电压,所述源极驱动器给下两行扫描线连接的像素单元充电前,所述时序控制器控制所述开关导通,所述奇数列数据线上的电压从第三电压变化为第四电压,所述偶数列数据线上的电压从第三电压变化为第五电压,之后所述时序控制器控制所述开关断开,所述源极驱动器给所述下两行扫描线连接的像素单元充电时,所述奇数列数据线上的电压从第四电压变换为第一电压,所述偶数列数据线上的电压从第五电压变化为第三电压。
10.根据权利要求9所述显示装置,其特征在于,所述第一电压和所述第三电压差值的绝对值与所述第二电压与所述第三电压差值的绝对值相同,所述第四电压和所述第三电压差值的绝对值与所述第五电压和所述第三电压差值的绝对值相同,所述第一电压大于所述第四电压,所述第四电压大于所述第三电压。
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